>>reporter: megan scully has also been directly affected by a mass shooting. megan scully shooting >> i lost my brother at 101 california 20 years ago to a similar incident. he was shot by a tech, dc 9 crazed man who also shot himselfonly took down eight people that time. >>reporter: stephanie and megan say something has to be done. >> how many more? all were of the gun yields mass killing. >>reporter: the people who took the time out of their saturday to come here in the cold and rainy weather say that it was important to do so not only to remember those who were lost but to open a dialog and say they never want to see something like this happen again. i'm jeff bush in san francisco, kron four news. ramif >> there were some tense moments in the nob hill neighborhood of san francisco this evening. california street was shut down just after 6:30 and police were negotiating with a suspect who was holed up in his apartment. police had suspect had a gun and may have had a hostage. >> a neighbor overheard some type of domestic dispute occuring with his next door ne